Hello all, I wanted to build my PDA properly … well – n bunch of confusion in the car. Somehow it didn’t work either – then I wanted to measure the voltage at the rear cigarette lighter —> Zack – by mistake n short circuit! Well – since then the beeping is as if you just left the key stuck and opened the door (but already if you want to start the car first). When I then started the car (with door open) it beeps without end. Door to = beep out. I have all Backups replaced – 2 were also broken and are still healthy after repeated control (under ́m steering wheel as well as in engine compartment). But it still beeps permanently. I am really overwhelmed – maybe one of you knows a solution. If then even short term would be … so much the better. Thanks in advance Tom from McPomm